linux-kernel - Re: [PATCH v2 12/15] drm/mediatek: add callback function to return RDMA layer number

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Date:   Mon, 6 Aug 2018 19:53:54 +0800
From:   Stu Hsieh <stu.hsieh@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v2 12/15] drm/mediatek: add callback function to return
 RDMA layer number

Hi, CK:

On Fri, 2018-08-03 at 13:13 +0800, CK Hu wrote:
> Hi, Stu:
> 
> On Fri, 2018-08-03 at 11:11 +0800, Stu Hsieh wrote:
> > This patch add callback function to return RDMA layer number
> > 
> > Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 10 ++++++++++
> >  1 file changed, 10 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > index b728f0f42611..8c145a87c9e5 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > @@ -60,6 +60,7 @@
> >  
> >  struct mtk_disp_rdma_data {
> >  	unsigned int fifo_size;
> > +	unsigned int layer_nr;
> >  };
> >  
> >  /**
> > @@ -194,6 +195,13 @@ static unsigned int rdma_fmt_convert(struct mtk_disp_rdma *rdma,
> >  	}
> >  }
> >  
> > +static unsigned int mtk_rdma_layer_nr(struct mtk_ddp_comp *comp)
> > +{
> > +	struct mtk_disp_rdma *rdma = comp_to_rdma(comp);
> > +
> > +	return rdma->data->layer_nr;
> 
> Maybe RDMA always has one layer, so you could just return 1 here.
> 
> Regards,
> CK
> 
OK

Regards,
Stu

> > +}
> > +
> >  static void mtk_rdma_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
> >  				  struct mtk_plane_state *state)
> >  {
> > @@ -227,6 +235,7 @@ static const struct mtk_ddp_comp_funcs mtk_disp_rdma_funcs = {
> >  	.stop = mtk_rdma_stop,
> >  	.enable_vblank = mtk_rdma_enable_vblank,
> >  	.disable_vblank = mtk_rdma_disable_vblank,
> > +	.layer_nr = mtk_rdma_layer_nr,
> >  	.layer_config = mtk_rdma_layer_config,
> >  };
> >  
> > @@ -329,6 +338,7 @@ static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
> >  
> >  static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
> >  	.fifo_size = SZ_8K,
> > +	.layer_nr = 1,
> >  };
> >  
> >  static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
> 
>